Specifications

6.21.1 Removing Upper Tractors
1. Remove the E-ring from the left end of the upper square shaft and
pulley assembly.
2. Remove the square shaft and pulley assembly.
3. Turn the horizontal vernier knobs until the tractors reach full left
stop.
4. Use a medium-size screwdriver to remove the two pan head screws
and washers from the round shaft bearing stop at the right end of
the round shaft. Remove the stop from the side frame.
5. Unlock the tractors from the round shaft. Hold the upper horizontal
adjustment knob while unscrewing the round shaft from the hand
knob. Move the shaft forward on the left end, then carefully with-
draw it from the printer.
6. If the tractors are being replaced, remove them from the round shaft.
If necessary, remove the pulley and hand knob from the round shaft.
7. To remove the pulley and hand knob from the round shaft, remove
the retaining ring and nylon spring from the left outside end of the
round shaft pulley. Remove the components inward through the side
frame.
8. Install the new left and right tractors on the round shaft. Position
the two tractors so that the white dots on the tractor bearings are
facing forward.
9. Install the round shaft and tractors assembly into the LG31. Hold
the horizontal adjustment hand knob from moving, and firmly screw
the round shaft assembly onto the hand knob.
10. Using the assembly hardware removed in step 4 above, install the
round shaft bearing stop.
6.21.2 Removing Lower Tractors
1. Remove the tractor feed (belt access) cover from the right hand side
of the printer.
2. Remove the E-ring from the left end of the lower square shaft and
pulley assembly.
REMOVAL AND REPLACEMENT PROCEDURES 6–43